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Skin Colors

Photo: People of all skin colors
Students from the Washington International Primary School in Washington, D.C., form a human rainbow of skin coloration. Melanin, a pigment, determines the color of skin and protects humans from the sun's ultraviolet rays.
Photograph by Sarah Leen

Health and Human Body Topics

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Photo: 2009 Winner

Photo Contest

Find out who takes home the Grand Prize!

Photo: Man carrying a kayak

Adventure Videos

Check out adventure videos from our West Coast Adventure Editor Steve Casimiro and go "Behind the Lens."

Body: The Complete Human

Image: Cover of Body: The Complete Human book

Explore the human machine.

The Incredible Human Body DVD and Video

Image: Cover of the Incredible Human Body video and DVD

Explore the human body from the inside out.